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Please consult the original WMO file or printed manual for more details and for possible notes!
0 Surface data - land 1 Surface data - sea 2 Vertical soundings (other than satellite) 3 Vertical soundings (satellite) 4 Single level upper-air data (other than satellite) 5 Single level upper-air data (satellite) 6 Radar data 7 Synoptic features 8 Physical/chemical constituents 9 Dispersal and transport 10 Radiological data 11 BUFR tables, complete replacement or update 12 Surface data (satellite) 20 Status information 21 Radiances (satellite measured) 31 Oceanographic data 101 Image data 255 Indicator for local use, with sub-category
13-19, 22-30, 32-100, 102-239 Reserved 240-254 For experimental use